Scientific and technical papers : articles in printer friendly PDF format or found on the Scientific Journals web sites;

科技论文：可以轻松打印的PDF格式文章或者在一些科学期刊网站上的文章；

youdao

Do you really want to know how your paper printer works, or do you just want it to print your papers?

你真的想知道你的票据打印机的工作原理，或者你只是想它来打印你的文章？

youdao

Do you really want to know how your paper printer works, or do you just want it to print your papers?

你真的想知道你的票据打印机的工作原理，或者你只是想它来打印你的文章？

youdao